Thermal evolution of hole dynamics in the large-dimensional t-J model
University of Oxford, Physical and Theoretical Chemistry
Laboratory, South Parks Road, Oxford OX1 3QZ, UK
Published online: 15 April 1999
The dynamics of a single hole in the model is solved exactly for all temperature, T, in the limit of large spatial dimensions, , using the Feenberg renormalized perturbation series. We focus in particular on single-particle spectra, together with optical and static hole conductivities. Explicit results are illustrated for a Bethe lattice, and exemplify the continuous thermal evolution of the underlying string picture from the T=0 string-pinned limit through to the paramagnetic phase. Quenched site-disorder is also readily incorporated, exact results thereby being obtained for the interplay between disorder and thermally-induced hole dynamics.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999